HP Labs Technical Reports

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Multilayer Piezoelectric Resonators for Medical Ultrasound Transducers

Greenstein, Michael



Abstract: Multilayer piezoelectric resonators were fabricated and the dependence of the electrical impedance and the coupling coefficient were measured as a function of the number of layers, for N=1,...20 layers. The magnitude of the electrical impedance followed the theoretical predicted 1/N(to the 2nd power) relation, and the coupling coefficient, K(sub t) remained relatively constant out to N=15 layers. These cofired resonators are suitable for medical ultrasound transducer.

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